<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Smarty {textformat}{/textformat} block plugin
 *
 * Type:     block function<br>
 * Name:     textformat<br>
 * Purpose:  format text a certain way with preset styles
 * or custom wrap/indent settings<br>
 * @link http://smarty.php.net/manual/en/language.function.textformat.php {textformat}
 * (Smarty online manual)
 * @param array
 * <pre>
 * Params:   style: string (email)
 * indent: integer (0)
 * wrap: integer (80)
 * wrap_char string ("\n")
 * indent_char: string (" ")
 * wrap_boundary: boolean (true)
 * </pre>
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param string contents of the block
 * @param Smarty clever simulation of a method
 * @return string string $content re-formatted
 */
function smarty_block_textformat($params, $content, &$smarty) {
	if (is_null ( $content )) {
		return;
	}
	
	$style = null;
	$indent = 0;
	$indent_first = 0;
	$indent_char = ' ';
	$wrap = 80;
	$wrap_char = "\n";
	$wrap_cut = false;
	$assign = null;
	
	foreach ( $params as $_key => $_val ) {
		switch ($_key) {
			case 'style' :
			case 'indent_char' :
			case 'wrap_char' :
			case 'assign' :
				$$_key = ( string ) $_val;
				break;
			
			case 'indent' :
			case 'indent_first' :
			case 'wrap' :
				$$_key = ( int ) $_val;
				break;
			
			case 'wrap_cut' :
				$$_key = ( bool ) $_val;
				break;
			
			default :
				$smarty->trigger_error ( "textformat: unknown attribute '$_key'" );
		}
	}
	
	if ($style == 'email') {
		$wrap = 72;
	}
	
	// split into paragraphs
	$_paragraphs = preg_split ( '![\r\n][\r\n]!', $content );
	$_output = '';
	
	for($_x = 0, $_y = count ( $_paragraphs ); $_x < $_y; $_x ++) {
		if ($_paragraphs [$_x] == '') {
			continue;
		}
		// convert mult. spaces & special chars to single space
		$_paragraphs [$_x] = preg_replace ( array ('!\s+!', '!(^\s+)|(\s+$)!' ), array (' ', '' ), $_paragraphs [$_x] );
		// indent first line
		if ($indent_first > 0) {
			$_paragraphs [$_x] = str_repeat ( $indent_char, $indent_first ) . $_paragraphs [$_x];
		}
		// wordwrap sentences
		$_paragraphs [$_x] = wordwrap ( $_paragraphs [$_x], $wrap - $indent, $wrap_char, $wrap_cut );
		// indent lines
		if ($indent > 0) {
			$_paragraphs [$_x] = preg_replace ( '!^!m', str_repeat ( $indent_char, $indent ), $_paragraphs [$_x] );
		}
	}
	$_output = implode ( $wrap_char . $wrap_char, $_paragraphs );
	
	return $assign ? $smarty->assign ( $assign, $_output ) : $_output;

}

/* vim: set expandtab: */

?>
